If the required lux is 1000 lux in the room. determine the numbe of light fixture required if the fixture efficacy is 100 with 75W each. The room dimension 4.5m 5m.

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Coulomb’s Law

Coulomb's law states that the attraction or repulsion force between two charged things is proportional to the product of their charges and inversely proportional to the square of their distance. It has an effect along the line that connects the two-point charges.